Ceramic whole blood hollow fiber membrane filter medium and use thereof for separating blood plasma/serum from whole blood
US-10500328-B2 · Dec 10, 2019 · US
Polymers of nitriles, e.g. polyacrylonitrile
Polymers of nitriles, e.g. polyacrylonitrile · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D71/42 |
| Official title | Polymers of nitriles, e.g. polyacrylonitrile |
| Display label | Polymers of nitriles, e.g. polyacrylonitrile |
| Total patents | 138 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 14 |
| 2017 | 5 |
| 2018 | 19 |
| 2019 | 14 |
| 2020 | 24 |
| 2021 | 16 |
| 2022 | 19 |
| 2023 | 13 |
| 2024 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Co2-philic thin film composite membranes
US-2019366277-A1 · Dec 5, 2019 · US
High separation performance polydialkylsiloxane pervaporation membranes
US-2019351372-A1 · Nov 21, 2019 · US
Membrane for the adsorption of bacteria
US-2019329188-A1 · Oct 31, 2019 · US
Hierarchical porous membrane for emulsion separation
US-10384961-B2 · Aug 20, 2019 · US
Acrylonitrile-based membrane with low thrombogenicity
US-2019224631-A1 · Jul 25, 2019 · US
Solvent resistant polyamide nanofiltration membranes
US-10357746-B2 · Jul 23, 2019 · US
Preparation of hand-carry gravity-driven water filter with high throughput and water disinfection performance
US-2019168172-A1 · Jun 6, 2019 · US
Liver support system
US-10265453-B2 · Apr 23, 2019 · US
Porous membrane separator for secondary battery, method for producing the same, and secondary battery
US-10256449-B2 · Apr 9, 2019 · US
Filtration membranes
US-2019054426-A1 · Feb 21, 2019 · US
Mixed matrix membrane filtration device for an appliance
US-2019039024-A1 · Feb 7, 2019 · US
Semipermeable membrane and method of manufacturing the same
US-2019015547-A1 · Jan 17, 2019 · US
Method for the high-throughput preparation of carbon nanotube hollow fiber membranes
US-10179314-B2 · Jan 15, 2019 · US
Zwitterion-containing membranes
US-10150088-B2 · Dec 11, 2018 · US
Forward osmosis-based separation membrane based on multilayer thin film, using crosslinking between organic monomers, and preparation method therefor
US-10143974-B2 · Dec 4, 2018 · US
Fluoropolymers and membranes comprising fluoropolymers (III)
US-10130918-B2 · Nov 20, 2018 · US
Flux-enhanced hierarchical porous membrane for oil-water nanoemulsion separation
US-10124300-B2 · Nov 13, 2018 · US
Solvent-resistant separation membrane
US-10099183-B2 · Oct 16, 2018 · US
Integrated device for liver support system
US-10086123-B2 · Oct 2, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D71/42?
- CPC B01D71/42 is the Cooperative Patent Classification code for “Polymers of nitriles, e.g. polyacrylonitrile.”
- How many patents are filed under CPC B01D71/42 (Polymers of nitriles, e.g. polyacrylonitrile)?
- Our database includes 138 publications tagged with this CPC code.
- Is patent activity under CPC B01D71/42 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).